PLATTSBURGH — In what authorities call the largest single seizure of heroin in Clinton County, two men from the Capital Region face felony drug charges after allegedly being collared with 600 bags of heroin with an estimated street value of $30,000.

The arrest of James Walker of Schenectady and Jose Alicea of Scotia shortly before 4 p.m. Wednesday punctuated a months-long probe. The 28-year-old Walker and Alicea, 27, were charged with one count each of third-degree possession of a controlled substance.

They were driving on Route 3 in Plattsburgh when they were stopped by Adirondack drug task force members at 11:15 a.m. Alicea led police on a brief foot chase before being nabbed. Police confiscated 600 bags of heroin after searching the car.